770400493 has 2 divisors, whose sum is σ = 770400494. Its totient is φ = 770400492.

The previous prime is 770400473. The next prime is 770400503. The reversal of 770400493 is 394004077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 708730884 + 61669609 = 26622^2 + 7853^2 .

It is an emirp because it is prime and its reverse (394004077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 770400493 - 2⁵ = 770400461 is a prime.

It is a super-2 number, since 2×770400493² = 1187033839229286098, which contains 22 as substring.

It is equal to p_39700564 and since 770400493 and 39700564 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (770400473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385200246 + 385200247.

It is an arithmetic number, because the mean of its divisors is an integer number (385200247).

Almost surely, 2^770400493 is an apocalyptic number.

It is an amenable number.

770400493 is a deficient number, since it is larger than the sum of its proper divisors (1).

770400493 is an equidigital number, since it uses as much as digits as its factorization.

770400493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 770400493 is about 27756.0892958644. The cubic root of 770400493 is about 916.7245261697.

The spelling of 770400493 in words is "seven hundred seventy million, four hundred thousand, four hundred ninety-three".